Heat Treatment Evaluation for the Camshafts Production of ADI Low Alloyed with Vanadium
| Autor: | Alejandro Cruz Ramírez, Eduardo Colin García, José Federico Chávez Alcalá, Jaime Téllez Ramírez, Antonio Magaña Hernández, Guillermo Reyes Castellanos |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Toughness
Materials science microstructure Vanadium chemistry.chemical_element 02 engineering and technology engineering.material mechanical properties 01 natural sciences camshaft Ductile iron 0103 physical sciences Ultimate tensile strength General Materials Science 010302 applied physics Austenite ductile iron Mining engineering. Metallurgy as-cast Metallurgy TN1-997 Metals and Alloys 021001 nanoscience & nanotechnology Microstructure chemistry Casting (metalworking) engineering vanadium ADI 0210 nano-technology Austempering |
| Zdroj: | Metals Volume 11 Issue 7 Metals, Vol 11, Iss 1036, p 1036 (2021) |
| ISSN: | 2075-4701 |
| DOI: | 10.3390/met11071036 |
| Popis: | Ductile iron camshafts low alloyed with 0.2 and 0.3 wt % vanadium were produced by one of the largest manufacturers of the ductile iron camshafts in México “ARBOMEX S.A de C.V” by a phenolic urethane no-bake sand mold casting method. During functioning, camshafts are subject to bending and torsional stresses, and the lobe surfaces are highly loaded. Thus, high toughness and wear resistance are essential for this component. In this work, two austempering ductile iron heat treatments were evaluated to increase the mechanical properties of tensile strength, hardness, and toughness of the ductile iron camshaft low alloyed with vanadium. The austempering process was held at 265 and 305 °C and austempering times of 30, 60, 90, and 120 min. The volume fraction of high-carbon austenite was determined for the heat treatment conditions by XRD measurements. The ausferritic matrix was determined in 90 min for both austempering temperatures, having a good agreement with the microstructural and hardness evolution as the austempering time increased. The mechanical properties of tensile strength, hardness, and toughness were evaluated from samples obtained from the camshaft and the standard Keel block. The highest mechanical properties were obtained for the austempering heat treatment of 265 °C for 90 min for the ADI containing 0.3 wt % V. The tensile and yield strength were 1200 and 1051 MPa, respectively, while the hardness and the energy impact values were of 47 HRC and 26 J these values are in the range expected for an ADI grade 3. |
| Databáze: | OpenAIRE |
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